Cutter chain



Feb. 20, 1940.

c. F. osGooD 2.190,674

CUTTER CHAIN l Filed Jan. 21, 1936 2 Sheets-Sheet 1 v i "n" Will" uhmm@Feb. 20, 1940. 3, F OSGQD 2,190,674

CUTTER CHAIN Filed Jan. 21, 1936 2 Sheets-Sheet 2 MWF @www y ill!" ffmIW nu", Mul" "mm" V iwf/63E sydo VIMI ing means and cutter chain" blockwhereby av inartermore fully appear. In the accompanying drawings thereare shown Patented Feb. 1.1940* arrosti` 25,190,574- l jff CUTTER CHAINlCharles Osgood, Claremont,` N. assigner to Sullivan Machinery Company,a "corporation of I Massachusetts Application January 21, 1,936, SerialNo. 60,081

7 Claims. (Cl. 26a-33) 'This invention relates "to cutter chains, and

more lparticularly to improvements 'in cutter chains especiallyadapted-for mining purposes.

An object of vthis inventionis toV provide an i improvedcutter chainhaving improved bit holding means. Another object is to provide animproved cutter chain vhavingrfm improved cuttor block structure andimproved'nieansfor holding the cutter bit on the cutter block. A furtherobject is `to provide an improved Vcutter bit holdcuttcr bit may besupported and held in any one ofA a plurality of positions with respectvto the block in an improved and effective manner.

A still further object is to provide an improved cutter chain wherein a`single form of cutter block` is used for supporting the cutter bitsin aplurality of cutting positions. A further object is to provide animproved supportingand holding means for a, reversible cutter'bit'of"the double endedl type. These and other Vobjects and advantages 'of theinvention Will, however, herefor purposes of illustration several'formswhich 'the invention may assume in practice.

` ln these drawings- Fig. 1 is a View in longitudinal section'through lone illustrative form of the improved chain block 3m i A and bitsupporting means.

. Fig, 2 is a cross sectional viewthrough the i chain, takensubstantially on lineZ--Z of l; land includeszthe holder andbit shown inend elevation. f y vFig.` 3 is` a view similar tol-iig. 2 showing achain block with the holder positioning and bit engaging surfacesarranged in `ay different `relation. e

Fig. 4 is a cross sectional view taken suhstan tially on line 4-'4 ofFig. 1. i l Fig. 5 is a detail sectional View takenV substantiallyon.line5-5 of Fig. 1. Fig'. 6 is a perspective View of the cutter-*bit iFig. '7 lisfa View similar to Fig. modified form of construction. v v

Fig. 8 is afcrosssectional View taken substantiallyorl lines-48offFigy'l.

.Fig 9 is avew 'similar to Figivlvshowingstill another modified' form ofconstruction.

In the illustrative form of the invention shown Vin ligs.` 1 to6,inclusive,.therimproved cutter chain comprises a series of.- chainblocks l pivotallyconnectedtogether bymeansof aseries of l showing astrap links t. sacher the .chain mocks l has a lateral lug 3 havingalongitudinal bore 4 for receiving a `holding bolt 5, thelatter havingacircular head engaging the rear face of the-lug.` vltflorurtedonthe'chain'block is a bit holder 6 ceiving in" the`r inclined position acutterbit gen- 10r erally designated Ili and shaped to iit the' body ofthe bit l y i The cutter bit ll 4comprises a body generally inthe form[of a triangle in side elevation having,l

`opposed cutting surfaces` l2 and i3 lying in the 1.5L

sides or an obtuse dihedral angle and terminals-f ing in cutting pointsiti and l5 at the same side of the bit. The cutterfoit may beadvantageously formed by `.cutting from" approximately"diamond shaped,crother symmetrically shaped bar stock,` forming the cutting surfaceslil andy I3 by cutting thestock diagonally and making successivediagonal outs, completing a bit by turning over the stock betweensuccessive cuts. By selecting par stock which" is. of symmetrical form"with 25 respect' to axes at right angles to eachother,- the cuttingfaces ofeach bit Will necessarily be the saine, if the angle. of`tlfiecutter to the bar stock bemaintaine'd the same. The cuttingsurfaces l2 and'i are herein `of elongated diamond $0 shape,l and areindividually symmetrical as to `both `major and minor axial.` lines. l

In this illustrative'construction, the lateral lug 3 oi the chain blockis` formed externally with relatively inclined flattened surfaces It,seven in 35 number, `lying `in thefaces of a twelve-sided polygon, andthe btholder headat theoppoi i Sitevsides of the bit receiving socket isformed with lateral ledges ll havingv inclined plane surfaces'liengageable with certain of the iiattened 4.0 surfaces I6 on the chainvblock lug, While the inactive cutting face i2 ci the cutter) bitarranged within thebit holder socket engages' a flattened surface l5 vonthel chain bloei; lug ine termediate the surfaces with which the bitholder 45 ledges il, lll engage in the manner shown in y Fig. 5./Mounted .onthe holding bolt 5 and having an opening i9 through whichthe holding bolt extends is a1 clamp member 2@ having a socket 212for'engaging the inner portion ofthe active 5 0 cutting face i3 ofthebit, this clampingmember having a cylindrical guide portion 2t fittingWithinsalongitudin'alguide bore 2S formed in the bitholder shankz'l. Theforward portion ofthe` holding bolt Ei` isjthreaded at 24 for receiving`for receiving a holding bolt 3l.

a tightening nut 25, and when this nut is tightened the clamping member2i] holds rmly the cutter bit within the bit holder socket with theinner inactive face l2 of the bitresting onthe flattened surface on thechain block lug. yIn Fig. 3 a chain block lug 26 is formed with attenedsurfaces 2l, siX in number, relatively inclined and staggered withrespect to the iiattened surfaces l6 so that .the bit holder may besecured in different relatively inclined positions with respect to thechain block lug. For instance, it will be noted that by releasing vtheholding bolt 5, the bit holder 6 may be positioned, as indicated indotted lines in Fig. 2, and by suitably positioning the bit holder, thecutter bit may be located in iive different positions with respect tothe chain block lug, whilein Fig. 3,

the bit holder may be located in four different and the bit turned endforend within the holder socket; and the bit is then again clamped inposition on the chain block lug, the cutting surface l2 at that timebeing active withthe inactive i cutting surface I3 engaging theflattened surface on the chain block lug.

:In the modified form of construction shown in` Figs. 7 and 8, the chainblock 30 is trans- Versely slotted at 3l to provide a lateral rearwardlylocated lug 32 and a front lug 33. The lug 32 is cut away at 34 and thecut away portion is formed externally with' flattened surfaces35vcorrespo'nding to the surfaces i6 and 2l, of theform of the inventionabovedescribed. The lug .32l is formed with a longitudinal bore 36Engaging the chain block lug is a bit holder 3B having a shank 39 havingan opening .diithrough which the holding bolt 31 passes, and the head 4|of this bit holder is formed with an inclined socket 42 extendingtherethrough for receiving a cutter bit 43. This cutter bit is similarto that shown Ain Fig.l6 with the exception that the cutting faces liein the sides of a triangle and form a dihedral angle whose edge includesthe opposite lateral extremity of the bit. The rear surface of the bitholder head abuts against the surface i4 ofthe cutaway portion of thechain block lug, and the holdervhead is formed with lateral4 ledges 45,45 Vsimilar to the ledges I'l, I1 of the bit holder above described, andsimilarly engaging the flattenedk surfaces 35 on the chain block lug atthe opposite sides of the surface with which the inactive cutting faceof the bit engages. The holding bolt 3i is formed with a circular head46 seated in an arcuate socket 41 formed on the' front lug 33 of thechain block, and this head engages a clamping member 48 having aclamping surface 49 engaging the inner portion of the active cuttingface `of the bit, this clamping member having an opening 56`throughwhich the `holding bolt passes. The lower portion of this clampingmember is formed with a lug l engaging the adjacent face of the bitholder shank so that when the holding bolt is tightened by adjusting atightening nut 52 provided with an inclined socket 66 extendingtherethrough for receiving a cutter bit 6| which is similar to thatdisclosed in Fig. 6 and formed in a similar manner. The inner inactiveface of the cutter bit engages the outer surface 62 of the chain block.A clamping member 63 is provided having a shank 64 likewise projectingwithin the chain block socket 56 and slidingly interlocked at 65 withthe shank of the bit holder, and this clamping member has a clampingsurface 66 engaging the inner portion of the active cutting face of thebit. Threaded within the forwardv portion of the chain block is astandard set screw 6l for engaging the shank of the clamping member for'tightly clamping the holder and bit in position on the block. Byloosening the set screw 5i the clamping member 63 may be released sothat the cutter bit may be turned end for end within the bit holdersocket so that when. one cutting point of the bit becomes dull, a newcutting point may be presented to the work.

`As a result of this invention, it will be noted that an improved cutterchain is provided having an improved chain block structure and improvedmeans for holding a cutter bit in cutting position on thechain block. Itwill further be noted that by providing the chain block lug withrelatively inclined fiat surfaces, it is possible to -adjust the bitholder intodierent bit holding positions with respect to each lug'sothat by means of but a pair of chain block designs a nine position chainmay be provided. Other uses and advantages of the improved cutter chainWill be clearly apparent to those skilled in the art.

While there are in this application specifically described several formswhich the invention may assume in, practice, it will be understood thatthese forms of the same are shown for purposes of illustration `and thatthe invention may be inactive cutting face of the bit resting on anrlateral lug, a detachable bit holder having a head form-ed with aninclined opening for receivr ing a Gutter-bit, adouble-ended'reversiblev cutter' on the lug, an end of the bit restingon a atv bit receivable in said holder opening and re-A lateral lug, abit holder having an obliquely dis` versible end for end therein, meansfor locating said holder and cutter bit selectively inany one of aplurality of relatively inclined cutting positions laterally withrespect to the block lug with the inactive cutting end of the bitresting on an outer surface of the vblock lug, and means for securingsaid holderand cutter bit'to said lug in any of aforesaid relativelyinclined positions with respect thereto. y

3. In a cutter chain, a chain block having a.

lateral lug formed withl relativelyinclined dattened surfaces, a bitholder for receiving a cutter bit and provided with relatively inclinedsurfaces engageable with certain of said inclined surfaces on the lug,an end of the bit resting on a flattened surface on the lug intermediatesaid surfaces on said bit holder, and means for securing said holder inposition on the chain vblock lug.

4. In a cutter chain, a chain block having a lateral lug formed withrelatively inclined flattened surfaces, a detachable bit holder havingan inclined socket for receiving a cutter bit and provided withrelatively inclined surfaces engageable with certain' of said inclinedsurfaces tened surface on the lug intermediate said surfaces on said bitholder, and means for securing said holder in position on the chainblock f lug, said holder adjustable into diierent relatively inclinedpositions with respect to the lug with said inclined holder surfaces andsaid bit end engaging others of said relatively inclined lug surfaces.

5. In a cutter chain, a chain block having a posed socket for receivinga cutter bit, a cutter bit disposable in an inclined cutting positionWithin said holder socket with its. cutting end projecting outwardly andforwardly from the holder, means for securing said holder on the blocklug with an end of the bit resting on the outer surface of the lug, andmeans for selectively locating the holder and bit in different inclinedcutting positions laterally with respect to the lug. 1

6. In a cutter chain, a chainblock'naving a lateral lug formed withrelatively inclined flattened surfaces, a detachable bit holder havingan inclined socket for receiving a cutter bit for supporting the latterwith itscutting end projecting outwardly from the holder, said holderprovided with relatively inclined surfaces engageable with certain ofsaid surfaces on said lug, and means for securing said holder inposition on said chain block lug Withsaid surfaces in en`` gagement.

'7. In a cutter chain, a chain block, a double- `ended reversible cutterbit having alinedcutting ends, bit holder means for securing the bit incutting position on the chain block with its inner inactive cutting endresting on a surface on the block, and means for selectively locatingsaid holder means and bit laterally in different relatively inclinedcutting positions with respect to the chain block, said bit releasableinan endwise direction from said holder means andreversible end for endwith respect to said holder means in any of aforesaid relativelyinclined cutting positions.

CHARLES F. OSGOOD.

